minix/lib/libc/arch/vax/sys/sbrk.S

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/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "SYS.h"
#if defined(SYSLIBC_SCCS) && !defined(lint)
/* .asciz "@(#)sbrk.s 8.1 (Berkeley) 6/4/93" */
RCSID("$NetBSD: sbrk.S,v 1.11 2011/01/25 02:38:15 matt Exp $")
#endif /* SYSLIBC_SCCS and not lint */
.globl _end
.globl _C_LABEL(__minbrk)
.globl CURBRK
#ifdef WEAK_ALIAS
WEAK_ALIAS(sbrk, _sbrk)
#endif
.data
_C_LABEL(__minbrk):
.long _end
CURBRK:
.long _end
.text
ENTRY(_sbrk, 0)
addl3 CURBRK,4(%ap),-(%sp)
pushl $1
movl %ap,%r3
movl %sp,%ap
chmk $ SYS_break
jcs err
movl CURBRK,%r0
addl2 4(%r3),CURBRK
ret
err:
jmp CERROR+2
END(_sbrk)